Woodworking machine



Original Filed Nov. 25, 1930 3 Sheets-Sheet 1 mi J/ May 15, 1934- F..scHlMMEL 1,958,719

WOODWORKING MACHINE original Filed Nov.` 2e, 1930 s sheds-sheet 2 o o oo May l5, 1934. F. scHlMMl-:L

WOODWORKING MACHINE 3 Sheets-Sheet 3 Original Filed Nov. 26, `19550 III{Il} IllilllJll Patented May 15, 1934 UNITED STATES PATENT oFFlCE.

Application November 26, 1930, Serial No. 498,355 Renewed October 11,1933 16 Claims.

My present invention relates to wood working or routing machines and isespecially designed as an improvement on the wood working machinedisclosed and broadly claimed in my pending United States applicationfor patent for Wood working machine, Serial Number 414,154, filedDecember 14, 1929, now Patent No. 1,839,- 599, issued January 5, 1932.

This invention is intended for general use in forming in members to beconnected a tongue and groove joint having longitudinal taperedengagement, whereby during assemblage said members have a free and easymovement, the one in respect to the other, except during the latter partof said movement when they engage each other with a wedge action.

The machine illustrated is designed for cutting a longitudinal taperedgroove in a member to receive a longitudinally tapered tongue in amember to be connected thereto.

To the above end, generally stated, the invention consists of the noveldevices and combination of devices hereinafter described and defined inthe claims.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a fragmentary plan view of a wood working machine having theinvention embodied therein;

Fig. 2 is a view principally in section taken on the line 2--2 of Fig.1;

Fig. 3 is a fragmentary detail View with some parts sectioned on theline 3 3 of Fig. 1;

Fig. 4 is a View corresponding to Fig. 3, with the exception that thesections of the way are locked in neutral;

Fig. 5 is a face view of a piece of work having longitudinally taperedgrooves'cut therein by the improved machine;

Fig. 6 is a fragmentary perspective view of one end of the piece of workat one of the grooves; and

Fig. 7 is a fragmentary face view of the piece of Work on which isindicated by broken lines the cut made by the tool and arrows indicatingthe direction of travel of the piece of work at the time the cuts aremade.

The numeral 8 indicates the frame of a wood working machine on the endsof which is a pair of upright cast brackets 9 that carry therebetween afixed horizontal cross-rail 10. On the top of the frame 8, under thecross-rail 10, is a pair of parallel track rails 11 which extend atright angles to the cross-rail 10.

A reciprocatory carriage 12 is mounted to travel under the cross-rail 10and is provided with front and rear pairs of iiat faced wheels 13arranged to run on the track rails 11 and support the carriage 12therefrom. The heads of the track rails 11 are flat and relatively Widein respect to the wheels 13 in order to permit said wheels to shiftaxially thereon during the longitudinal travel of the carriage 12, aswill presently appear.

Positive guide means is provided for causing the carriage 12 to travelin a line that extends at right angles to the cross-bar 10, whichdirection will hereinafter be referred to as neutral, or to travelobliquely to neutral either to the left or the right thereof. This guidemeans also positively holds the carriage against angular movement in ahorizontal plane when travelling either neutral or oblique to neutral.The oblique travel of the carriage 12 is accomplished by endwiseshifting said carriage on the track rails 11 during its reciprocatorymovement thereon.

Said guide means may take various different forms and, as shown, is achanneled way 14 comprising two longitudinally spaced sections and apair of cooperating roller-equipped studs 15 arranged to run one in thechannel in each of said sections. The way 14 extends midway between thetrack rails 11 from the front to the rear of the machine and the twosections thereof are pivoted at the same or their rear ends to achanneled bar 16, as indicated at 17. This bar 16 is rigidly secured tothe frame 8 and supports the Way 14 with its sections resting thereonfor horizontal swinging movement and the axes of the pivots 17 are atneutral or, in other Words, on a line that extends at right angles tothe cross-bar 10.

Ihe sections of the way 14, at their front or free ends, are heldagainst lifting movement from the bar 16 but with freedom for horizontalswinging movement by tongue and groove guides 18. The tongues of theseguides 18 are formed by extending the bottom members of the sections ofthe way 14 and the groove for the tongue on the rear way section isformed by notching the rear end of the front way section and the groovefor the tongue on the front way section is formed in a block 19 rigidlysecured to the bar 16.

Swinging movement is imparted to the two sections of the way 14 byeccentric rollers 20 which work in slots 21 in the bottoms of'said riage12 A bar. The pivots 23 for the eccentric rollers 20 and their arms 22are anchored to the web of the bar 16. Simultaneous and like movementsare imparted to the eccentric rollers 20 by a long link 24 whichvconnects the arms 22 and is pivoted at its ends thereto equidistantfrom the centers of the pivots 23. The front arm 22 is extended toprovide a handle 25 by which the two arms 22 may be manually oscillated.

An opposing pair of stops 26 is provided for limiting the swingingmovement of the front section of the way 14, and hence', the rearsectionof said way through the connections 20,y

22 and 24. These stops 26, as shown,`are'in the form oflock-nut-equipped screws which have threaded engagement with upstandinglugs 27 on the sides of the bar 16 and with their inner ends arranged tobe engaged' by the side flanges of the front sectionofthe' way 14, seeFigs. 3 and4.

yThe roller-equipped studs 15 are rigidly secured to and depend fromtheV under side of the carriage 12 and their rollerswhich turn aboutvertical axes are arranged to run Yon the inner faces of the sideflanges of 'the' sections of the way 14 with a working Vfit and therebyprevent idewi'se or transverse'moveme'nt of Vthe carriage 12 in respectto the wa'y 14j It is important to] note that the distance between theaxesof the two rollers of the studs 15 is exactly the same as'lthedistancebetween the axes of the two pivots17. VObviously, when thecarriage 12 is positioned with the axes of the -two rollers of the studsiaiignd with' the' axes of th'epivots 17 rno sidewise movement iswimparted to the f carriage 12 when the sections of the'way 14 areoscillated by the eccentric rollers 20. On the other hand when thecarriage 12 is'moved into aI position'in which the axes vof the studs 15are out of alignment with the-axes or tnevpivots 17 anA the handle 25operated to oscilla'te the sections of*` the way 14 slight sidew'ise'`movement will be impartedV to said'carriagel When thev two sectionsofthe way 14 are in true longitudinal alignment or' neutral Vthecarwill'be guided thereby in a line that extends at a right angletothe'cross-.rail 10. On the other hand when the sections of the way 14are positioned oblique toneutral the carriage 12 will 'be moved endwiseeither' tothe right or the'leftsof neutral, depending on which sidethereof the sections of Vthev wayv 14 arepositioned', duringreciprocatory movementof said carriage. By thus guiding the carriage I24the same' is` po'sitivelyheld against angular movements in a horizontalplane.

On the front end of the bar 16 is a fixed stop 28 in the form Vof ashort post arranged tov be engaged 'by4 the front edge of the carriage12 atmits transverse Vcenter Vto limit its forward movement .on therails 1 1. An adjustable stop 29 on the rear end of the bar 16 isprovided for limiting'th'e rearward movement of the carriage 1.2 on therails lill The adjustable stop 29 is inthe form of a fixed post 30 and ahorizontal locknut-equipped screwv 31, which has threadedengagfernenttherewith. Said screw 31 extends forward from the post 30andpositioned to be engaged by the rearv edge of thecarriage 12 at thelimit of'its rearward movement. The obj jectI offrnfaking the stop29:,adjustable is to cause the carriage 12 to stop with the axes of therollers of the studs 15 at neutral and in alignment with the pivots 17.As the Obliquity of the two sections of the way 1 4 are identical thecarriage 12 when said sections are in an oblique position will be movedendwise during the reciprocatory movement thereof. Of course, thisendwise movement of the carriage 12 is very slight,` as will hereinafterappear.

'On the front of the carriage 12 is a pair of handle bars 32 by means ofwhich said carriage may be reciprocated. To hold the sections of the way14 in neutral, there is provided a lockpin 33 arranged to be insertedthrough aligned holes in the front end portion of the front 'sectionofthe way 14 and the bar 16, see Fig. 4.

For holdinga piece of work X on the carriage 12 in which grooves are tobe cut, there is provided at the front of said carriage a pair ofangleblocks 34 and at the back of said carriage a nut-acting block 35.The blocks 34 are mounted on a rail 36 attached to the front edge of thecarriage 12 and held by set-screws for independent adjustments inrespect to each other. The nutacting block is mounted on a long screw 37turnably mounted in front and rear bearings 38 on the carriage 12 andheld against endwise movement. On the rear end of the screw 37 is ahand-crank 39 by which the set-screw may be turned. The sliding contactof the nut-acting block 35 with the carriage 12 holds said block fromturning withv the screw 37. The nut-acting block 35 is located midwaybetween the blocks 34 land has rigidly secured thereto a spring-iingcr40 which directly engages the piece of work X.

The machine is equipped with two cutters 41 for simultaneously cuttingtwo grooves Y in the piece of work X. The cutters 41 are of conicalformation for cutting a groove having screws 45 forfrigidly securing thesamein dify ferent adjustments on the slidesl 44 and said slides areprovided with hand-screws 46 for rigidly securing said slides indifferent adjustments on the cross-rail 10. By adjusting thecross-headsY 43 on the slides 44 the cutters 41 4 may be moved eitherforward or rearward and set either directly opposite each other to cutgrooves of the same length or one in advance ofthe other so as to cutgrooves of different lengths, as vshown` inv Fig'. 5. vBy moving theslides 44 on the cross-rail 10 the cutters 41 may be adjustedtransversely of the machine in respect to each other and set differentdistances apart. The motor supports on the cross-heads 43 are mountedfor vertical adjustments to vary the depth at which the cutters 41 willcut grooves but for the purpose of this case, it is not thoughtnecessary to consider the same.

Operation It may be assumed that the cutters 41 are adjustable to cuttwo grooves at the desired places in the piece of work X mounted on thecarriage 12 and that said work is forward of said cutters. rEhe operatorfirst moves'the lever 25 into its full line position, see Fig. 1, toposition the sections of the way 14 oblique to normal and at the rightthereof and then moves the carriage 12, by means of its handle bar 32,rearward to feed the work to the cutters 41. The cutter 41, which isadjusted to cut a groove completely across the work is rst engaged bysaid work and thereafter the work engages the other cutter 41. Thisrearward movement of the carriage 12 continues until stopped by theengagement of said carriage with the stop 29 and which movement issuicient to cut one of the grooves completely across the piece of workwhile the other extends only part-way thereacross.

The obliquely positioned sections of the way 14 cause the carriage 12 tomove transversely to the left during its movement from the front to therear of the machine and thereby cause the cutters 41 to out dovetailgrooves in the work of the same width that extend slightly obliqueacross said work. At the time the carriage 12 is stopped by the rearstop 29, it is positioned with the roller of the studs 15 in axialalignment with the pivots 17 and at neutral.

The operator next manipulates the handpiece 25 to move the sections ofthe way 14 to the left of normal and during this movement of saidsections the sides thereof, with which the rollers of the studs 15engage, simply turn about said rollers without imparting any transversemovement whatsoever to the carriage 12. With the sections of the way 14thus adjusted, the operator draws the carriage 12 forward and said wayimparts a transverse movement thereof to the left of neutral, whichcauses the cutters 41 to re-cut the left-hand sides of the grooves andtaper the same in respect to neutral and thereby complete the grooveswhich are longitudinally tapered, as shown in Fig. 5.

During the lateral shifting movement of the carriage 12 iirst to oneside of neutral and then to the other, said carriage is securely heldagainst angular movements in a horizontal plane. This is due to the factthat the two sections of the way 14 are always at the same angle toneutral and that the rollers of the studs 15 are always equi-distantfrom the pivots 17.

From the foregoing it must be evident that the invention hereindisclosed is capable of large range of modication within the spirit ofthe invention herein disclosed and claimed.

What I claim is:

1. In a machine of the class described, a cutting tool, a carriagemounted for reciprocatory movement to feed a piece of work to and fromthe cutting tool, a guide for the carriage including a way and a pair ofcooperating studs, said way comprising two longitudinally spacedsections pivoted at the same ends for shifting movement from normal, inwhich said sections are longitudinally aligned, to oblique positions oneither side of normal, said studs cooperating one with each section ofthe way and arranged to be brought substantially into axial alignmentwith the pivots of the sections of the way in one extreme position ofthe carriage, and operating connections for imparting simultaneous andlike movements to the sections of the way.

2. The structure defined in claim 1, which further includes a stop forlimiting the oblique movements of the sections of the way on each sideof normal.

3. The structure defined in claim 1, which further includes a stop forlimiting the movement of the carriage toward the pivote-d ends of thesections of the way and position the same with the studs substantiallyaxially aligned with the pivots of said sections.

4. The structure dened in claim 1, which further includes a lock forholding the sections of the way in neutral.

5. The structure defined in claim l in which the operating connectionsinclude an eccentric for each section of the way and means forconnecting the eccentrics for common movements.

6. In a machine of the class described, a cutting tool, a carriagemounted for reoiprocatory movement to feed a piece of work to and fromthe cutting tool, a guide for the carriage including a channeled Way anda pair of cooperating roller-equipped studs, said way comprising twolongitudinally spaced sections pivoted at the same ends for shiftingmovement from normal, in which the channel in said sections islongitudinally aligned, to oblique positions on either side of normal,the rollers of said studs being arranged to run on both of the sideflanges of the channel in the sections of the Way and positioned one ineach of said sections, said rollers being arranged to be broughtsubstantially into axial alignment with the pivots of the sections ofthe way in one extreme position of the carriage, and operatingconnections for imparting simultaneous and like movements to thesections of the way.

7. The structure defined in claim 6 in which said connections includefor each section of the way a pivoted arm having an eccentric rollerworking in a slot in said section and a link connecting the arms.

8. The structure defined in claim 6 which further includes an adjustablestop at each side of one of the sections of the Way for limiting theoblique movement of the sections of the way from normal.

9. The structure defined in claim 6 which further includes a lock forholding the sections of the way normal.

10. In a machine of the class described, a reciprocatory carriage, andmeans for moving the carriage in the plane thereof transversely of itsline of travel during its reciprocatory movement and for holding saidcarriage against angular movement in said plane, said means includes away having a front section and a rear section and a pair of memberscooperating, one with each of said sections, the sections of the waybeing straight, parallel and oblique to the line of travel of thecarriage.

11. The structure dened in claim 10 in which the sections of the way arepivotally mounted for movement to change their angle to the line oftravel of the carriage.

l2. The structure dened in claim 10 in which the sections of the way aremounted for movement to change their angle to the line of travel of thecarriage, and which structure further includes means for angularlymoving the sections of the way and for keeping the same constantlyparallel.

13. The structure defined in claim 10 in which the sections of the wayare pivotally mounted for movement into a position in which they arelongitudinally aligned to prevent said transverse movement of thecarriage.

14. The structure defined in claim 10 in which the sections of the wayare pivotally movable the sections of the Way are movable from one sideto the otherV of a medial position in which they are longitudinallyaligned, and means for simultaneously moving the sections of the Way andfor keeping the same parallel when at either side of said medialposition, and adjustable stop means for positively holding one of thesections of the Way Where set.

FRIDOLIN SCHIMMEL.

YGO

